Microshutter array system for James Webb Space Telescope

Li, M. J.; Adachi, Takayuki; Allen, Christine A.; Babu, Sachi; Bajikar, Sateesh S.; Beamesderfer, Michael; Bradley, Ruth; Costen, Nicholas; Kevin, Denis; Ewin, Audrey J.; Franz, David E.; Hess, Larry A.; Hu, Ron; Jackson, Kamili M.; Jhabvala, M.; Kelly, Daniel Clay; King, Todd; Kletetschka, Günther; Kutyrev, A.; Lynch, Bernard A.; Meyer, Stephen E.; Miller, Timothy M.; Moseley, S. H.; Mikula, Vilem; Mott, Brent; Oh, Lance; Pontius, James T.; Rapchun, David A.; Ray, Chris; Schwinger, Scott; Shu, P.; Silverberg, R. F.; Smith, Wayne; Snodgrass, Steve; Sohl, D.; Sparr, Leroy; Steptoe-Jackson, Rosalind; Thate, Robert; Wang, F.; Wang, L.; Zheng, Yun; Zincke, C.

doi:10.1117/12.734152

Cited by 16 publications

(10 citation statements)

References 8 publications

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“…Digital micro-mirror arrays have been developed with OPTICON assistance [12], and allow masks to be generated in situ. This technology offers some advantages as an alternative to the MOEMS shutter arrays developed for JWST NIRSPEC [13]. Fibre-based systems image the optical field onto multi-mode fibres, which are placed at selected locations either manually or automatically.…”

Section: Multi-object Spectroscopymentioning

confidence: 99%

The OPTICON technology roadmap for optical and infrared astronomy

2010

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The Key Technology Network (KTN) within the OPTICON programme has been developing a roadmap for the technology needed to meet the challenges of optical and infrared astronomy over the next few years, with particular emphasis on the requirements of Extremely Large Telescopes. The process and methodology so far will be described, along with the most recent roadmap.The roadmap shows the expected progression of ground-based astronomy facilities and the technological developments which will be required to realise these new facilities. The roadmap highlights the key stages in the development of these technologies.In some areas, such as conventional optics, gradual developments in areas such as light-weighting of optics will slowly be adopted into future instruments. In other areas, such as large area IR detectors, more rapid progress can be expected as new processing techniques allow larger and faster arrays. Finally, other areas such as integrated photonics have the potential to revolutionise astronomical instrumentation.Future plans are outlined, in particular our intention to look at longer term development and disruptive technologies.

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Section: Multi-object Spectroscopymentioning

confidence: 99%

The OPTICON technology roadmap for optical and infrared astronomy

2010

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“…where ω n = k m is the natural frequency of the system and ζ = 2ωn b . We can then multiply the transfer function by each summation term in (4). When making this step, we must also substitute ω with nω, since nω is the frequency in each summation term.…”

Section: Theorymentioning

confidence: 99%

“…One broad class of MEMS use actuators to achieve mechanical motion in response to applied electrical inputs. Examples include micromirrors [1]- [3], shutters [4], valves [5], RF filters [6], [7], nanopositioners [8]- [11] and atomic writing systems [12]. MEMS actuators can be built using a wide range of driving methods including electrostatic [13]- [16], electromagnetic [17], [18], thermal [19]- [21] and piezoelectric [22] techniques.…”

Section: Introductionmentioning

confidence: 99%

PWM as a Low Cost Method for the Analog Control of MEMS Devices

Pollock

Barrett

Corro

et al. 2019

J. Microelectromech. Syst.

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In this paper we discuss the use of pulse width modulation (PWM) to control analog MEMS devices. We achieve precise linear analog control of MEMS by applying a PWM signal with a frequency well above the system's mechanical natural frequency. We first demonstrate this using a parallel plate actuator and comb-drive, then extend the technique to control a commerical deformable mirror. Such an approach allows the system designer to replace expensive drive electronics such as high precision DACs and high voltage, linear amplifiers with a simple on-off switch. Advancements in the electronics industry tend to make precise timing cheaper and faster; our approach exploits these long term trends to create low cost control circuits. We also show how PWM control can linearize the positional response of devices where typically the position would depend quadratically on the applied, analog voltage.

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“…The MSA is an array of small (100×200 micron) shutter blades connected to a frame by narrow torsion bars which can be opened through magnetic actuation and latched open electrostatically. 15,16 The JWST project eventually preferred the MSA to the DMDs, mostly on the basis of easier optical design and concerns relative to scattered light, contrast, and flatness of the relatively large mirror facets. The most recent MSAs qualified for flight on JWST come in 171×365 pixels format and operate in cryogenic conditions ( Figure 3).…”

Section: Early Developmentsmentioning

confidence: 99%

Applications of DMDs for astrophysical research

Robberto

Cimatti

Jacobsen³

et al. 2009

SPIE Proceedings

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A long-standing problem of astrophysical research is how to simultaneously obtain spectra of thousands of sources randomly positioned in the field of view of a telescope. Digital Micromirror Devices, used as optical switches, provide a most powerful solution allowing to design a new generation of instruments with unprecedented capabilities. We illustrate the key factors (opto-mechanical, cryo-thermal, cosmic radiation environment,...) that constrain the design of DMD-based multi-object spectrographs, with particular emphasis on the IR spectroscopic channel onboard the EUCLID mission, currently considered by the European Space Agency for a 2017 launch date.Comment: 10 pages, Proc. SPIE 721

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Microshutter array system for James Webb Space Telescope

Cited by 16 publications

References 8 publications

The OPTICON technology roadmap for optical and infrared astronomy

The OPTICON technology roadmap for optical and infrared astronomy

PWM as a Low Cost Method for the Analog Control of MEMS Devices

Applications of DMDs for astrophysical research

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